1. A method for solving linear programming models with Interval Type-2 fuzzy constraints

This paper shows a method for solving linear programming problems that includes Interval Type-2 fuzzy constraints. The proposed method finds an optimal solution in these conditions using convex optimization techniques. Some feasibility conditions are presented, and some interpretation issues are discussed. An introductory example is solved using the proposed

Pesqui. Oper.. Publicado em: 31/03/2014

2. Eletrodo compósito à base de grafite-Araldite®: aplicações didáticas - parte II

This work proposes the use of a graphite-Araldite® 70% (graphite, m/m) composite electrode in didactic experiments, specifically in the quantitative determination of the neurotransmitter dopamine (DA) in a sample of pharmaceutical formulation. The goal is to demonstrate the possibility of using voltammetric techniques in quality control of medicines, beside

Quím. Nova. Publicado em: 31/03/2014

3. Extracellular methionine amino peptidase (MAP) production by Streptomyces gedanensis in solid-state fermentation

A bioprocess was developed for extracellular MAP production from Streptomyces gedanensis by solid-state fermentation. Response surface methodology of Box Behken Design was performed to evaluate the interaction effects of most significant variables {inoculum size, (NH4)2SO4 concentration, MgSO4.7H2O and tryptone) on MAP production after the single parameter o

Braz. arch. biol. technol.. Publicado em: 31/03/2014

4. Optimization of Phenolics and Flavonoids Extraction Conditions and Antioxidant Activity of Roasted Yerba-Mate Leaves (Ilex paraguariensis A. St.-Hil., Aquifoliaceae) using Response Surface Methodology

Este trabalho objetivou maximizar a extração de fenólicos e flavonoides totais bem como a atividade antioxidante de erva-mate tostada (Ilex paraguariensis) frente ao radical livre 1,1-difenil-2-picrilhidrazila (DPPH) em função do tempo (5, 7,5 e 10 min) e a temperatura de extração (60, 75 e 90°C). Os dados foram submet

An. Acad. Bras. Ciênc.. Publicado em: 31/03/2014

5. Severe hypoxemia during veno-venous extracorporeal membrane oxygenation: exploring the limits of extracorporeal respiratory support

OBJECTIVE: Veno-venous extracorporeal oxygenation for respiratory support has emerged as a rescue alternative for patients with hypoxemia. However, in some patients with more severe lung injury, extracorporeal support fails to restore arterial oxygenation. Based on four clinical vignettes, the aims of this article were to describe the pathophysiology of thi

Clinics. Publicado em: 28/02/2014

6. Optimization of Pd-B/γ-Al2O3 catalyst preparation for palm oil hydrogenation by response surface methodology (RSM)

Response surface methodology was used to design and evaluate the experimental variables for Pd-B/γ-Al2O3 catalyst preparation. The catalyst was prepared by impregnation and chemical reduction. Thirteen different samples of the catalyst were prepared at different KOH concentrations and annealed at various temperatures, before applying them in palm oil hy

Braz. J. Chem. Eng.. Publicado em: 28/02/2014

7. Multi-model MPC with output feedback

In this work, a new formulation is presented for the model predictive control (MPC) of a process system that is represented by a finite set of models, each one corresponding to a different operating point. The general case is considered of systems with stable and integrating outputs in closed-loop with output feedback. For this purpose, the controller is bas

Braz. J. Chem. Eng.. Publicado em: 28/02/2014

8. Sacrificio cortoplacista adaptativo 2opt (SCA_2opt): Una heurística inspirada en el pensamiento sistémico

Outlining two novice heuristics for the symmetric TSP, inspired systemic thinking: Sacrifice short-term adaptive 2-opt (SCA2opt) and SCA_2opt_r. These arise from the systemic analysis of the rule of decision, nearest neighbour, identifying the archetype "Counterproductive solutions". SCA relies on that agent traveler, renounces at any given time immediately

Prod.. Publicado em: 28/02/2014

9. Optimizing the control system of cement milling: process modeling and controller tuning based on loop shaping procedures and process simulations

Based on a dynamical model of the grinding process in closed circuit mills, efficient efforts have been made to optimize PID controllers of cement milling. The process simulation is combined with an autoregressive model of the errors between the actual process values and the computed ones. Long term industrial data have been used to determine the model param

Braz. J. Chem. Eng.. Publicado em: 28/02/2014

10. Development and optimization of a HPLC-RI method for the determination of major sugars in apple juice and evaluation of the effect of the ripening stage

The sugars in apple juice prove its authenticity and its sensory and nutritional properties. The aim of this study was to develop and validate a simple analytical method using high performance liquid chromatography with refractive index detection (HPLC-RI) to determinate and quantify the sugars sucrose, D-glucose, D-fructose, and D-sorbitol polyol in apple j

Food Sci. Technol (Campinas). Publicado em: 28/02/2014

11. Design and optimization of self-microemulsifying drug delivery system (SMEDDS) of felodipine for chronotherapeutic application

O objetivo desse trabalho de pesquisa foi planejar, desenvolver e otimizar sistema de liberação de fármaco auto-microemulsificante(SMEDDS) de felodipino (FL) em cápsulas de gelatina dura revestidas com polímero, a fim de obter liberação rápida após tempo desejado no manejo da hipertensão. A microemulsão

Braz. J. Pharm. Sci.. Publicado em: 28/02/2014

12. Otimização na programação de montagens na indústria aeronáutica

Este trabalho estuda um caso prático de programação da produção na indústria aeronáutica. Tarefas devem ser programadas em gabaritos de montagem com várias estações de trabalho adjacentes entre si, levando em consideração restrições especiais de processamento simultâneo destas tarefas (restrições de adjacência). Tais restrições surgem dev

Gest. Prod.. Publicado em: 28/02/2014